Standard caveats. Don’t try this at home. It worked in my gun this time. Don’t know if it’ll work in yours.
At this time there is no loading data available for 30 Super Carry. But that doesn’t matter because I used a surplus powder that is not listed loading manuals. It is very close AA#5. It is not BR5. I worked up to a charge of 5.5 grains. The primers looked very much like full throttle 357 loads but not as flat as 220 Swift loads.
I fired factory Federal American Eagle 100 grain FMJ flat points and the Remington 100 grain HST JHP. Measured the outside diameter at the widest point and found them both to be 0.343”. My hand loads all had the same measurement. I interpret that as my loads were not exceeding the ability of the chamber to stand the pressures I generated.
The 2 factory loads both had cartridge over-all lengths of 1.150” and I used the same COL for my loads.
The boolit I used was Accurate 31-117E cast 96% Pb, 2% Sb and 2% Sn, air cooled, aged 1 week, lubed with Felix lube, sized 0.316”.
The gun was S&W Shield EZ. The magazine has a very flat front and sharp corners. It has a fully supported and ramped barrel.
I chronographed all the loads today at 97 degrees F. Yep a hot day in May in Central Texas. 5 shot strings.
The American Eagle 100 grain load gave 1177 fps, sdev 5, hi 1185, lo 1170, es 15 fps.
The Remington 100 grain JHP load gave 1168 fps, sdev 9, hi 1181, lo 1155, es 26 fps.
My final load of 5.5 of a surplus #5 type powder, 117 grain boolit gave 1153 fps, sdev 6, hi 1161, lo 1146, es 15 fps.
Groups…no real data bc I was firing free standing at 20 yards with my shaky hands. Best couple of groups were 3”. A couple went 5”. This does not indicate potential precision of the loads/gun.
I was really surprised the gun would feed the 31-117E boolit. But looking at how the magazine presents the cartridge, it rides pretty high and the square cut feed lips release the back of the cartridge kind of early.
I fired the hand load into a row of 10, 1-gallon water jugs. The first jug was shredded, the second ripped, the third just holed both sides, the fourth caught the boolit. The fifth jug was hit hard enough to pop the sealed top from the jug. The boolit expanded from the 0.304” nose OD to 0.430-0.440”.
The 50k psi pressure 30 Super Carry can run does allow it to punch above its weight.